接地系统设计对变电所弱电系统的影响及对策

Effect of Design of Grounding System on Low Voltage System of Substation and Countermeasures

随着高压变电所内弱电系统如微机保护、综合自动化装置的大量应用,如何制定针对性较强的措施,达到电磁兼容是现代电气设计所必须解决的课题。变电所内接地系统的设计及运行情况的好坏不仅影响电力系统安全运行,也是影响变电站电磁干扰的重要方面。以宝钢内部变电所为例,主要探讨如何优化变电站接地技术设计来改善和控制变电站的电磁干扰问题,以保证变电所内二次设备和微机自控装置的安全稳定运行。

There was frequent application of the low voltage system in the high voltage substation such as microcomputer protection devices and comprehensive automation devices. How to establish corresponding measures to meet the standard of electromagnetic compatibility had become an important problem to be solved in modem electrical design. Design and operation state of the grounding system in the substation played a very important role in safety operation of the power system as well as electromagnetic interference of the substation. Taking for example the substation of Baoshan Iron ＆ Steel Co., Ltd., optimization of the grounding technological design of the substation was mainly discussed to improve and control electromagnetic interference of the substation, and to guarantee safe and stable operation of the sec- ondary equipment and microcomputer automatic control system in the substation.